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Finding the Fourth Proportional to 463,621.76, 639,169.84 and 396,361.28

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Solution

The fourth proportional to 463,621.76, 639,169.84 and 396,361.28 is: 546,441.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    463,621.76 : 639,169.84 = 396,361.28 : x
  2. Step 2: Convert to fraction form
    463,621.76/639,169.84 = 396,361.28/x
  3. Step 3: Cross multiply
    463,621.76x = 639,169.84 × 396,361.28
  4. Step 4: Simplify right side
    463,621.76x = 253,342,175,919.80
  5. Step 5: Solve for x
    x = 253,342,175,919.80/463,621.76
  6. Step 6: Final answer
    x = 546,441.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.